| Helensburgh to Casamassima | 1,425.76 mi (2,294.54 km) |
| Helensburgh to Casandrino | 1,348.02 mi (2,169.43 km) |
| Helensburgh to Casapulla | 1,341.25 mi (2,158.53 km) |
| Helensburgh to Casarano | 1,516.46 mi (2,440.51 km) |
| Helensburgh to Casatenovo | 936.36 mi (1,506.92 km) |
| Helensburgh to Casciana Terme | 1,096.61 mi (1,764.82 km) |
| Helensburgh to Cascina | 1,085.72 mi (1,747.30 km) |
| Helensburgh to Caselle Torinese | 922.05 mi (1,483.90 km) |
| Helensburgh to Caserta | 1,342.67 mi (2,160.83 km) |
| Helensburgh to Casier | 1,027.01 mi (1,652.81 km) |
| Helensburgh to Casorate Primo | 949.91 mi (1,528.74 km) |
| Helensburgh to Casoria | 1,351.37 mi (2,174.82 km) |
| Helensburgh to Cassano al Ionio | 1,474.13 mi (2,372.38 km) |
| Helensburgh to Cassano d'Adda | 951.39 mi (1,531.11 km) |
| Helensburgh to Cassano delle Murge | 1,424.94 mi (2,293.21 km) |
